<template>
  <div>
    <!-- 面包屑导航开始想要修改组件原有样式时尽量把后来修改的样式写在全局样式里面 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

      <!-- 卡片视图区域 -->
      <el-card>
          <!-- 为echarts准备一个具有宽高的dom -->
          <div id="main" style="width:750px;height:400px;"></div>
      </el-card>
  </div>
</template>


<script>
  //导入echarts
  import echarts from 'echarts'
  //引入lodash让两个对象合并
  import _ from 'lodash'
export default {
  data() {
    return {
        options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    }
  },
  created() {},
 // DOM渲染出来后执行
 async mounted () {
      //准备好dom初始化echarts实例
    var myChart=echarts.init(document.getElementById('main')) 
    //准备数据和配置项
      const {data:res}=await this.$http.get('reports/type/1')
      if(res.meta.status!==200) return this.$message.error('获取数据失败')
       //将文档提供的对象和请求结果对象进行合并
       const resObj=_.merge(res.data,this.options)
    //展示数据  
    myChart.setOption(resObj);
  },
  methods: {}
}
</script>

<style lang="less" scoped>
</style>

